function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      oldonload();
      func();
    }
  }
}

function insertAfter(newElement,targetElement) {
	var parent = targetElement.parentNode;
	if (parent.lastChild == targetElement) {
		parent.appendChild(newElement);
	} else {
		parent.insertBefore(newElement,targetElement.nextSibling);
	}
}

function preparePlaceholder() {
	if (!document.createElement) return false;
	if (!document.createTextNode) return false;
	if (!document.getElementById) return false;
	if (!document.getElementById("imagegallery")) return false;
	var placeholder = document.createElement("img");
	placeholder.setAttribute("id","placeholder");
	placeholder.setAttribute("src","images/remodel10j02a.jpg");
	placeholder.setAttribute("alt","Island Craftsman - Remodel");
	var description = document.createElement("p");
	description.setAttribute("id","description");
	var desctext = document.createTextNode("Before");
	description.appendChild(desctext);
	var gallery = document.getElementById("imagegallery");
	gallery.parentNode.insertBefore(placeholder,gallery);
	gallery.parentNode.insertBefore(description,placeholder);
	/*insertAfter(placeholder,gallery);
	insertAfter(description,placeholder);*/
}

function prepareGallery() {
	if (!document.getElementsByTagName) return false;
	if (!document.getElementById) return false;
	if (!document.getElementById("imagegallery")) return false;
	var gallery = document.getElementById("imagegallery");
	var links = gallery.getElementsByTagName("a");
	for ( var i=0; i < links.length; i++) {
		links[i].onclick = function() {
			return showPic(this);
		}
	}
}

function showPic(whichpic) {
	if (!document.getElementById("placeholder")) return true;
	var source = whichpic.getAttribute("href");
	var placeholder = document.getElementById("placeholder");
	placeholder.setAttribute("src",source);
	if (!document.getElementById("description")) return false;
	if (whichpic.getAttribute("title")) {
    	var text = whichpic.getAttribute("title");
	} else {
    	var text = "";
	}
	var description = document.getElementById("description");
	if (description.firstChild.nodeType == 3) {
		description.firstChild.nodeValue = text;
	}
	return false;
}

addLoadEvent(preparePlaceholder);
addLoadEvent(prepareGallery);